Draft and lifting device for agricultural tractors



4April 14,1931.

R. A. DELAYE 1,800,284

DRAFT AND LIFTING DEVICE FOR AGRICULTURAL TRACTORS Filed Jan. 25. 1929 2SheBtSShBBt l lfff April 14, 1931- R. L. A. DELAYE 1,800,2845A DRAFT ANDLIFTING DEVICE FOR AGRICULTURAL TRACTORS .Filed Jan. 25. 1929 2Sheets-Sheet 2 In the annexed drawings:

Patented Apr. 14, 1931 UNITED STATES PATENT oFFics RAOUL LOUIS ANDRDELAYE, F CRE-ST, FRANCE, ASSIGNOB T0 lSOCIETE RESPONSA- BILITE LIMITEER. DELAYE GcrCIE., OF CREST, FRANCE, A FIR-M OF FRANCE DRAFT AND LIFTINGnvror. Fon .AGRICULTURAL 'rnacroas Application led January 25, 1929,Serial 170.384,94?, and in France February 6, 1988. y i

which the plough can be lifted clear of the ground when the same is notrequired for work, in order to permit the use of a wheelless plough.

Fig. 1 is a side view of the mechanism adapted to a tractor of standardconstruction and comprising a reversible plough, which 1s shown'lifted.

Fig. 2 is a similar view, the plough restlng on the ground.

Fig. 3 is a partial section on line III-III of Fig. 2 showing the draftear.

Fig. 4 is a side view of t e lifting gear drawn to an enlarged scale,the parts being shown at the beginning of the lifting movement.

Fig. 5 is a plan view of 4.

Fig. 6 is a section on line I-.-VI of Fig. 4.

In Figs. 1 and 2, onl the rear part of the tractor 1 is represente andthe near wheel is supposed removed.

The draft gear (Figs. 1, 2 and3) comprises -a forked member 2 secured tothe plough 3.-

Each armof member 2 'is connected by a pin 4 to a double bar 5 which is,in turn, pivotally connected at 6 to a rod 7. The latter passes througha lu 8 secured to the tractor frame and is provi ed with buffer springs9 and 10,

as shown, which provide an elastic connection between the tractor andthe draft ear.

4 which is pivotall connected at 15 al screw 16 provided with aand-wheel 17, this screw 16 v extending through a nut 18 which ispivotally secured to the plate 11.

This gear permits of adjusting the `depth of work of the'plough, bymeans of the handwheel 17, without stopping the tractor. The springs 9and 10 prevent excessive strains during working. f

A collar 19 is pivotally secured at 20 to the plough 3, and the liftingbar 21 for the plough passes freely through this collar 19 and iselastically connected therewith by means of a spring 22 (Figs. 1 and 2)The other end of bar 21 (Figs. 4, 5 and 6 is pivoted at 23 to a lever 24keyed on a sha 25 supported b a frame 26 fixed at the rear of tractor1.' second lever 27 is also keyed on shaft 25 and a rack 28 is pivotedat 29 to this second le'ver.

The rack 28 is rovided with a long guide slot 30 through which passes apin 31 secured at the lower end of a hand-lever 32 pivoted at 33 to asupporting arm 34 secured'to the frame 26. A spring 35 acts on lever 32to brin the same to the position shown in Figs. 1 an 2.'

Rotatabl mounted in frame 26 isa shaft 36 on whic is keyed a inion37adapted to co-operate with the rac 28 when the same is lowered bymeans of the lever 32 t0 the position shown in Fig. 4. This shaft 36 isdriven by the motor of the tractor through any suitable vtransmissiongearing. The tractor can be provided with a shaft rojectin from the rearof the usual gear f ox and a apted to carrya pulley or the'like topermit the use of the tractor as a drivingv motor for variousagricultural machines. When such is the case, this shaft 38 or, a.shaftconnected to the en of the same, is provided with a worm39 meshingwith a worm-wheel 40 keyed on shaft' 36.-

(gings. 4 to c):

ip'rovided with a notch 42 on its upper radial edge. A lever 43 ispivoted at 44 to the frame 26;.andcarries a pin I45 which freelthroughs. curved slot 46 provi ed in the rame.2,6 'A spring 47 acts onlever 43 .and tends to turn same clockwise so as to press the pin 45against the periphery of the sector 41.l v "The .working of themechanism is as follows z In the position'shown in Fig. 2, the plough 3rests on the ground andworks' the soil,

10 lifte The teeth of'rac v28 are engagedfrom pinion 3 7 the lever 32returns -1. Mechanism for the depth of the work being adjustable' bymeans off the wheels 17 asr previously del-v scribed.

To lift the plough, the operator movesthe l' lever 32 into the positionshown in Fig. 4.

The rack 28 is thus lowered and meshes with pinion 37 which movestherack forward` whereb the shaft 25 is turned by the arm 2.7 and nilson'the bar 2-1 andthe plough is given the shape illustrated whic ensuresrfect enga ement of the parts even if the i iieever 32 is reeased.

When the rotation .of the shaft is suiii- 15 cient thel in y45 will haveslid over the curved edge of t e sector 41 and become' en a ed 1n the.notch-42 the rear end of the toot e part of rack'28 will be engaged onthe pinion-37 and as soon as the last tooth-of the rack is disto itsnormal position under the action ofv spring V andthe rack is'lited bythe .pin 31, the shaft'25 being held stationary since the sector' 41abts' againstthe `pin 45 enf 25 gaged iii the notch 42. lhe parts thusassuine the position shown-in Fig. 1'. i f To release the plough, itonlyv necessary to turn lever 43 anticlockwise .to disengage' the pin 45from the notch 42,-as will be ily understood.

' preventsshocksto the plough.:

i; i invention and desire .i connecting a the like to a tractor,comprisinlg embed g draft rods elastica hei lit of the rear partof saiddraft an gear adapted to lift the plough the ground. i 'f I ateiitYofthe 4United (plough 4or j ft gear connected vlwith' t e tractor; meansfor a justing vthe fgear roinA at the fore ends thereof; lugs secured tothe tractor andreceivin said draft rods; and

s ring means elastically connecting said raftrodswith said lugs. Y

4. Mechanism for connecting a lough or the -likej to a' tractor,comprising raft gear tractor and adapted to cooperate with saidl rack;means for rotating' said pinion; means `for guiding said rack, saidmeansbeing adustablein position to perinit-l of bringing said rack intoen agement with said pinion whereby the ploug is lifted from the ground;

means fr maintaining said lifting rod when the plough is in its liftedposition; means for gui ng rack in a direction substantially parallel tothe toothed edge said guiding pin is secured, ysaid lever bein pivotedto a frame secured to the tractor; an s ring means acting on said leverto.bring t e saine into such position that the rack is out of engagementwith its driving pinion. In testimonywhereof I aix my signature.

i HMOUL LOWS ANDRE DELAYE. The Spring 22 ac. as

` 2. Mechanism for connecting a plough or.

the like to a tractor, comprising draft gear,

' fd dra ear embodying a forked member foted to said forked member atthe bifurcatgell' 'comprising a forked-member secured to* the plough;draft bars pivotedvto-botlrb,v

furcated ends of said forked member, each 'of i said bars beingv formedof two parallel eie-v `ments spaced-apart, lugs-on bothsides of the'secured-to t e plough, guidedv draft bars pivtractor at the rearthereof, said liig'spioject-l i ing between the elements of said draftbarsv 'and being rovided with 'aii elongated sub- Y stantially orizontal"slot':k a''pin secured to both elements of each 'of said draft bars'andj 1, .passing through said slot to form af guide for' l "ite rtsibar, draft rodspivot'ed to bars ed end thereof, draft rods pivoted tosaid, draft bars and elastically .connected with the f ti-actor; meansfor ad'usting the heightof aft barsand liftin the rack comprising aguiding pin extending through an elongated slot in said thereof; .alever to which lil

